According to the policy of Paytm, you must be 18 years old to do Paytm KYC.
If you are below 18 age, you cannot do the complete Paytm KYC process.
Paytm Terms & Conditions:
According to paytm terms & conditions user should be 18 age.
You must be 18 to KYC in any online company
.Igf you are below 18 age then you can not complete paytm KYC .